Both WTI crude and Brent crude prices are currently hovering around $48 to $49 per barrel — well above their lows, below $30 per barrel, earlier this year.

Notably, in a recent report to clients, a Morgan Stanley team led by Adam Longson wrote that they think oil supply will ramp back up.

"Oversupply is likely to return as outages resolve, and prices could fall back into a $30-50 oversupply pricing regime," the team wrote.

Specifically, they argue that many of the causes of the recent outages — such as the Canadian wildfires— will subside, and the reduced production from maintenance projects in the North Sea and Brazil will soon moderate. Moreover, they believe that OPEC members Saudi Arabia, Iran, and Libya could ramp up production (although other analysts have expressed doubt about Libya in particular).

"Returning Canada production alone should be enough to put the market back into oversupply, even if Nigeria remains near current levels," they wrote.

However, the team did concede that there are plenty of wild cards that could upset this forecast. For example, Nigeria's outages could continue for some time, and, although it probably won't lead to huge disruptions, what will happen with Venezuelan barrels is still up in the air.

"Tail risks are admittedly large in both directions, as geopolitics create more uncertainty," they wrote. "The risks of both additional disruption and supply returning are elevated."